The IER states
The table below provides the average national levelized costs for the generating technologies represented in the updated AEO2009 reference case.[3] The values shown in the table do not include financial incentives such as state or federal tax credits, which impact the cost and the competitiveness of the technology. These incentives, however, are incorporated in the evaluation of the technologies in NEMS based on current laws and regulations in effect at the time of the modeling exercise, as well as regional differences in the cost and performance of the technology, such as labor rates and availability of wind or sun resources. . . .In short the table reflects the cost of electricity from the various energy sources. In the cases of solar and wind, making the electricity reliable will cost extra.
The levelized cost for each technology is evaluated based on the capacity factor indicated, which generally corresponds to the maximum availability of each technology. . . .
Intermittent renewable resources, e.g. wind and solar, are not operator controlled, but dependent on the weather or the sun shining. Since the availability of wind or solar is dependent of forces outside of the operator’s control, their levelized costs are not directly comparable to those for other technologies although the average annual capacity factor may be similar. Because intermittent technologies do not provide the same contribution to system reliability as technologies that are operator controlled and dispatched, they may require additional system investment as back-up power that are not included in the levelized costs shown below.
| Plant Type | Capacity Factor (%) | Levelized Capital Cost | Fixed O&M | Variable O&M (including fuel) | Transmission Investment | Total System Levelized Cost |
| Advanced Nuclear | 90 | 84.2 | 11.4 | 8.7 | 3.0 | 107.3 |
| Wind | 35.1 | 122.7 | 10.3 | 0.0 | 8.5 | 141.5 |
| Wind-Offshore | 33.4 | 193.6 | 27.5 | 0.0 | 8.6 | 229.6 |
| Solar PV | 21.7 | 376.6 | 6.2 | 0.0 | 12.9 | 395.7 |
| Solar Thermal | 31.2 | 232.1 | 21.3 | 0.0 | 10.3 | 263.7 |
| Geothermal | 90 | 86.0 | 20.7 | 0.0 | 4.8 | 111.5 |
| Biomass | 83 | 71.7 | 8.9 | 23.0 | 3.9 | 107.4 |
| Hydro | 52 | 97.2 | 3.3 | 6.1 | 5.6 | 114.1 |